The people born between March 21 and April 20 belong to this star sign and there are separate birthstones corresponding to these two months. Aquamarine and Blood stone for March and Diamond for April. Each of these gemstones has their own set of properties which become prominent when they are worn by a person. Aquamarine is a blue or turquoise variety of the mineral Beryl. The virtues of loyalty, bravery and friendship are associated with this birthstone. In terms of healing power, Aquamarine is considered to have a calming effect relieving stress and leading to inner peace apart from helping in throat problems. Bloodstone or heliotrope comes in a green hue with red inclusions resembling blood which gives it the name Bloodstone. It is associated with innovation, idealism and compassion. It is also believed to purify blood and improve blood flow and is considered to counter infections. Diamond, the most popular of the three, symbolizes purity, energy and relationship. It acts as a detoxifier and is good for the nervous system. It is also believed to improve eyesight and fight allergies.